Guide to the location and style of the revision codes of early One Inch Seventh Series mapping. In this example, the revision code is "A".
Guide to the location and style of the revision codes of later One Inch Seventh Series mapping. In this example, the revision code is 'B/*', which shows that despite the copyright date of 1962, the map is actually from 1966.
Extract of
Ordnance Survey 1:10000 mapping, showing
A2700. Taken from OpenSpace layer on SABRE Maps.
This page includes a scan of a non-free copyrighted map, and the copyright for it is most likely held by the company or person that produced the map. It is believed that the use of a limited number of web-resolution scans qualifies as fair use under United States copyright law, where this web page is hosted, as such display does not significantly impede the right of the copyright holder to sell the copyrighted material, is not being used to generate profit in this context, and presents information that cannot be exhibited otherwise.
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Using the SABRE Maps calibration utilities to rectify an image via lat/long points
screenshot for help with tracing
Guide to the location and style of the revision codes of the earliest OS One Inch Fifth mapping. In this example, the revision code is '9200/31', which indicates that there were 9200 copies of this map, and it was published in 1931. Occasionally later revision codes were tacked onto the end, and it is the righthand most code that is the most important.
Guide to the location and style of the revision codes of the usual OS One Inch Fifth mapping. In this example, the revision code is '3035', which indicates that there were 3000 copies of this map, and it was published in 1935.
Guide to the location and style of the revision codes of the final OS One Inch Fifth mapping. In this example, the revision code is '8039 M.39 R.39', which indicates that there were 8000 copies of this map, and it was published in 1939. The final section is additional information showing that the last minor revision was in 1939 and roads and railways were correct to 1939.
Guide to the location and style of the revision codes of early OS One Inch New Popular Edition mapping.
In this example, the revision code is '1214', which is one of the unique print codes in use in the late 1940s and early 1950s.
Guide to the location and style of the revision codes of later OS One Inch New Popular Edition mapping, which are similar to those found on Seventh Series mapping.
In this example, the revision code is 'F'.
SABRE Maps Grid calibrator, 2020 edition
SABRE Maps OSM calibrator, 2020 edition
Guide to the location and style of the revision codes of OSI Half Inch mapping. In this example, the revision code is '5-57', which simply indicates that it was published in May 1957.
Guide to the location and style of the revision codes of OSNI Half Inch Second Series mapping. In this example, the revision code is 'A'.
Guide to the location and style of the revision codes of pre-war OS Quarter Inch Fourth Series mapping. In this example, the revision code is '60/37 M.36 R.30-2', meaning this particular map was published in 1937.
Guide to the location and style of the revision codes of immediate post-war OS Quarter Inch Fourth Series mapping. In this example, the revision code is '20,046/Cr', meaning this particular map was published in 1946.
Guide to the location and style of the revision codes of late edition OS Quarter Inch Fourth Series mapping. In this example, the revision code is 'D'.
Extract from the SABRE Maps Co-ordinate Finder showing the location of the
Newbridge Junction between the
M8 and
M9 in various projection and co-ordinate systems
Screenshot showing SABRE Maps annotation
Guide to the location and style of the revision codes of OS Quarter Inch Third Edition mapping. In this example, multiple revision codes have been appended to earlier ones; with the 'real' one being the latest one, so in this case '1000/34', meaning this particular map was published in 1934.
Ordnance Survey Ten-Mile Road Map of Great Britain cover, 1956 edition
Ordnance Survey Route Planning Map of Great Britain cover, 1975 edition
Ordnance Survey Ten Mile Road Map of Great Britain cover, 1930s style
OSNI One Inch revision code from a Third Series example. This code should not be used for dating purposes
Guide to the location and style of printing dates on OSNI One Inch sheets, 1958 in this example.
Guide to the location and style of printing dates on OSNI One Inch Third Series sheets, 1971 in this example.
Extract from OS MoT map Sheet 16, 1926-27 edition
Image to assist in using the SABRE Maps Grid Calibrator tool to georeference map sheets.
The red arrows represent ordered rows to be completed, whilst the blue circles represent locations for each georeferencing point (or click position); every thick gridline, one row at a time.
Image to assist in using the SABRE Maps Grid Calibrator tool to georeference map sheets.
The red arrows represent ordered rows to be completed, whilst the blue circles represent locations for each georeferencing point (or click position); every thick gridline, one row at a time.
Image to assist in the use of the SABRE Maps Online Grid Calibrator, showing the guide arrows
Demonstration of a 'disguised projection' where the underlying map is of a different projection to the printed grid, leading to the grid being skew to the map.
Map Type control for the SABRE Maps Online Grid Calibrator
Map Sheet control for the SABRE Maps Online Grid Calibrator
Main controls for the SABRE Maps Online Grid Calibrator
Image to assist in using the SABRE Maps Grid Calibrator tool to georeference archaic map sheets using native Cassini or Bonne projections. The red arrows represent ordered rows to be completed, whilst the blue circles represent locations for each georeferencing point (or click position); every gridline, one row at a time.
Image to assist in using the SABRE Maps Grid Calibrator tool to georeference 'disguised projection' map sheets where the map and the grid printed on the map are to different projections.
In this image, the red lines are used to show the location of the 'virtual edges' of the map, in other words, the largest rectangle of gridlines that is fully contained within the map itself.
The example image is of a Second War Edition map, as the War Office Grid is the most skew of the commonly found grids with respect to the underlying mapping, which is on a Cassini (Delamere) projection.
Image to assist in using the SABRE Maps Grid Calibrator tool to georeference 'disguised projection' map sheets where the map and the grid printed on the map are to different projections.
In this image, the red arrows represent ordered rows to be completed, whilst the blue circles represent locations for each georeferencing point (or click position); every thick gridline, one row at a time up to the 'virtual edges' of the map.
The example image is of a Second War Edition map, as the War Office Grid is the most skew of the commonly found grids with respect to the underlying mapping, which is on a Cassini (Delamere) projection.
Next expected click location control for the SABRE Maps Online Grid Calibrator.
The top value is the Eastings, the bottom value is the Northings.
Dialog box that appears following the last expected click for the SABRE Maps Online Grid Calibrator
Image to assist in using the SABRE Maps Grid Calibrator tool in Advanced Mode, where the map needs to be georeferenced in a non-standard order.
This is an example showing one of the possible directions within the dialog box to assist.
Screenshot showing SABRE Maps annotation, 2024 user interface